Hi, I am planning on using EVP_* APIs to encrypt/decrypt my data. One thing I am wondering about is whether I can do in-place encryption, meaning I don't have to pay the price of an extra memory buffer to store my cipher text and a potential memcpy back to the source buffer.
I tried that with the EVP_* APIs by essentially passing in the same buffer to the plaintext and cipher text input pointers, and it seems to work. I am using AES XTS mode, and I understand that that may not work if I were to use a different mode. I am wondering if this behavior for AES XTS that allows in-place encryption/decryption is going to stay?
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